Typewriting and accounting machine



Jan. 18, 1949. o. J. SUNDSTRAND TYPEWRITING AND ACCOUNTING MACHINE 4 Sheets-Sheet l Filed April 23, 1945 INVENTOR OSCAR J. SUNDSTRAND BY K ATTO RNEY

Jam.v 18, 1949.

O. J. SUNDSTRAND TYPEWRITING AND ACCOUNTING MACHINE Filed April 23, 1945 4 Sheets-Sheet 2 23% Z30 Eq. 5 K V W w 5 2x2 22a 22 w my 1% 1%? a;

I I I i -7 A INVENTOR OSCAR J.SUNDYS TRAN,D

ATTO R NEY Jan. 18, 1949; o. .J. SUNDSTRAND 2,459,469

TYPEWRITING AND ACCOUNTING MACHINE Filed April 25, 1945 4 Sheets-Sheet 3 INVENTOR OSCAR J. SUNDSTRAND ATTORNEY Jan. 18, 1949. 0...]. SUNDSTRAND 2,459,469

TYPEWRITING AND ACCOUNTING MACHINE Filed April 23, 1945 4 SheebsSheet 4 INVENTOR OSCAR J. SUNDSTRAND Patented Jan. 18, 1949 UNITED STATES PATENT OFFICE TYPEWRITING AND ACCOUNTING MACHINE Oscar J. Sundstrand, West Hartford, Conn., as-

signor to Underwood Corporation, New York, N. Y., a corporation'of Delaware Application April 23, 1945, Serial No. 589,766

20 Claims. 1

This invention relates to accounting machines and to combined typewriting and accounting machines of the type comprising one or more registers and differential actuating mechanism for the registers, mounted for relative movement in an advance direction to carry the actuating mechanism into and out of the zone of a, register and from denomination to denomination of the register and in a return direction to restore the register and actuating mechanism relatively to starting positions, the numbers being entered, digit by digit in the registers.

Machines of this type usually comprise carriage movable in letter spacing and return directions and either the register or the master wheel or other register actuating means is mounted on the carriage to enable the actuating means to be shifted into and out of the zone of the register and from denomination to denomination of the register.

A power operated carriage return mechanism is ordinarily embodied in such machines for returning the carriage to position for starting a. line of Writing. Such machines have been provided with locking mechanism for locking the carriage from return movement when the machine is set for the operation of the register and the actuating mechanism is located in the zone of the register. The purpose of this mechanism is to prevent the actuating mechanism and register from being relatively shifted in a return .direction after a digit has been entered in the register as this is liable to result in an erroneous computation. A locking means for preventing the carriage return driving means from being rendered operative While the register actuating mechanism in the zone of a register is usually associated with said carriage locking mechanism. It is often desirable, in machines of this class, with a machine set for the operation of the register to be able to move the carriage in a return direction when the actuating mechanism is in the zone of a register and no digit has been entered in the register. For example, the actuating mechanism is often positioned by the operator with relation to the register by depressing the release key to allow the carriage to be advanced by its actuating spring and, at the same time, controlling the advance movement of the carriage manually. In this operation, the carriage is allowed to advance until the actuating mechanism is located in the proper denomination of the register and the operator then frees the release key to cause the arrest of the forward movementof the carriage. In positioning the carriage in this manner, the

a carriage is often moved one or more denominations in an advance direction beyond the required denomination and it is then desirable to be able to move the carriage back one or two spaces by the operation of the back space key. With the machine conditioned for computing it is also often desirable, when the actuating mechanism is located in the zone of a register, to cause the return of the carriage to position to start a line of typing by throwing in the carriage return drive mechanism.

With a machine provided with the above locking mechanism, in order to impart a return movement to the carriage when the carriage is located in a register zone, it is necessary first to shift the carriage in a forward direction to locate the actuating mechanism out of the zone of the register after which any desired return movement may be imparted to the carriage. Then when the operator wishes to return the carriage to a position short of the full or partial return positions provided for by'the carriage return mechanism, the return movement is usually imparted to the carriage by hand. When the carriage is to be given a full or partial return movement provided for by the carriage return mechanism, a carriage return key is depressed to cause the return movement of the carriage.

The forward movement of the carriage re-- quired to disengage the actuating mechanism from the register before any return movement can be imparted to the carriage and the imparting of the return movement to the carriage either by hand or by the action of the carriage return mechanism take a considerable amount of labor, time and care especially if the register contains a large number of denominations. The operator may have to efiect these movements of the carriage many times during a days operation.

One object of the present invention is to improve the construction and mode of operation of locking mechanisms for accounting machines and typewriting and accounting machines of the type referred to above for locking the actuating mechanism and the register from relative return movement when the machine is in condition for computing and the actuator mechanism is located in the zone of a register and to provide such machines with a locking mechanism. for this purpose which Will avoid the disadvantages above pointed out in prior construction.

Another object of the invention is to provide machines of the above type with mechanism for preventing relative return movement from being imparted to the actuating mechanism and the register when the machine is in condition for computing and the actuating mechanism is in the zone of a register which shall be rendered operative only after a digit has been entered in the register.

Another object of the invention is to provide ma chines of the type above referred to with means for preventing the carriage return mechanism from being thrown into operation when the machine is in condition for computing and the actuating mechanism is located in the zone of a register which means also is rendered operative only after a digit has been entered in the register.

With the above and other objects in View, the invention consists in a machine embodying the novel and improved features, constructions and combinations of parts hereinafter described and particularly pointed out in the claims, the advantages of which will be readily understood and appreciated by those skilled in the art.

The various features of the invention will be clearly understood from the accompanying drawings illustrating a machine embodying the invention in its preferred form and the following detailed description of the construction therein shown.

In the drawings:

Fig. 1 is a view in vertical section of the machine and illustrating particularly the type bar mechanism and the differential mechanism for operating the registers to enter therein the digits from 3 to 9, inclusive.

Fig. 2 is a detail view partly in side elevation and partly in vertical section illustrating certain parts of the mechanisms shown in Fig. 1 and certain associated parts.

Fig. 3 is a detail view partly in side elevation and partly in vertical section illustrating a portion of the mechanism shown in Fig. 2 with certain of the parts in difierent positions.

Fig. 4 is a detail view in vertical section illustrating certain parts of the state controlmechanism of the machine,

Fig. 5 is a detail view in rear elevation illustrating the means for locking the carriage against return movement and for preventing the carriage return drive from being rendered operative and certain parts of the control mechanism therefor,

Fig. 6 is a detail view partly in side elevation and partly in vertical section illustrating a portion of the machanism shown in Fig. 2, with certain parts in different positions, I

Fig. 7 is a detail view partly in side elevation and partly in vertical section illustrating a portion of the mechanisms shown in Fig. 6 with certain parts in different positions,

Fig. 8 is a detail view partly in side elevation and partly in vertical section illustrating in different positions, certain parts of the mechanisms shown in Figs. 1 and 6,

Fig. 9 is a detail view in rear elevation illustrating certain parts of the escapement and certain parts of the means for enabling the difierential mechanism when the carriage enters the zone of a register, and

Fig. 10 is a detail perspective view illustrating particularly the carriage return mechanism, and

Fig. 11 is a detail view in vertical section taken substantially on the line HH of Fig. 5.

The machine illustrated in this application, ex-

cept for the mechanism for locking the carriage against return movement when the machine is set for computing and the carriage is in the zone of a register, has substantially the same construction, arrangement and mode of operation line.

' pawl.

of the parts as the machine illustrated and described in the patent to Sundstrand No. 2,370,505, dated February 2'7, 1945.

In the illustrated construction, the machine comprises a platen frame provided with side rails or bars indicated at 2 connected together in spaced relation by cross bars (not shown) and a sub- 7 stantially flat platen 4 mounted for vertical movement in said frame. Upon the side rails of the .platen frame is supported a line space frame movable forwardly and rearwardly on tracks formed upon tne upper edges of said rails to line space the type carriage with relation to the platen. The line space frame comprises side brackets or bars, one of which is indicated at 6 connected by front and rear rails, of which the rear rail is indicated at 8. Upon the line space frame is mounted a type carriage or head indicated as a whole at E0 upon which are pivoted the usual series of type bars each carrying one or more types for engaging the Worksheets supported on the platen.

The type bars are arranged to be operated by power driven mechanism. In the present machine, this mechanism is, in part, carried by the type carriage. The carriage also carries the usual series of keys forming the keyboard of the machine and controlling the coaction of the type bars with the power driven mechanism. The carriage also carries a master wheel by which the totalizers or registers are driven and mechanism for driving the master wheel differentially by power to set up or enter successively the various digits of a number, step by step, in the registers.

The type carriage is mounted for movement, forwardly and rearwardly, with the linespace frame and is also mounted for lateral movement on said frame in a right-hand direction to letter space during a typing operation and for return movement in a left-hand direction to restore the carriage to position for starting the typing of a The carriage is provided with front and rear wheels or rollers arranged to engage respectivel the front and rear rails of the linespace frame. One of the rear rollers is indicated at H in Figure 1. The carriage is acted upon by the usual metallic band having one end attached to the carriage and connected with the usual spring drum which tends yieldingly to move the carriage constantly in a right-hand direction along the rails of the linespace frame. These elements are not shown in this application but are illustrated and described in applicants Patent No. 2,370,505 referred to above. The letterspacing movements of the carriage are controlled by the usual escapement mechanism indicated at Each of the type bar mechanisms comprises a type lever [3, an intermediate lever l4, and a series of links and levers l5, l6, l1, l3 and [9 connecting the intermediate lever with the type bar through which the type bar is actuated to engage the type with the work sheet supported on the platen, upon the downward movement of the intermediate lever. The power mechanism for actuating the intermediate lever comprises a longitudinally movable transmitting link 20, a radius arm or lever 2|, a longitudinally movable drive link 22, a pawl 23 movably mounted on said drive link and a continuously rotating toothed or fluted shaft 24 arranged to be engaged by said The driving link is swung laterally to en.-

igage the pawl with the fluted shaft by means of tending arm of a key'lever 28.

The machine illustrated is provided with a register 30 mounted at the rear of the machine upon a register bar 32 supported on the linespace frame, said register being provided with totalizer wheels 34.

The type carriage is provided with power driven mechanism for actuating the totalizer wheels of the column registers to set up numbers in said wheels. This mechanism is controlled by the numeral keys of the typewriter keyboard. This mechanism comprises a master wheel 36 fixedly mounted on a shaft 31 journaled in bearings on the frame of the type carriage, a differential actuator shaft 38 also journaled in bearings on said frame, and a series of gears 39, 40 and M connecting the shaft 3'! with the differential shaft. The shaft 38 is rotated differentially to impart differential movements to the shaft 31 and the master wheel 36. The mechanism for actuating the shaft 38 comprises a series of rack bars 42 pivotally suspended on arms 43 pivoted on a shaft 44 extending across the type carriage, a bail 46 also pivoted on said shaft and engaging said arms, a spring 48 acting on the bail, and a continuously rotating toothed or fluted shaft 50 arranged to be engaged by the rack bars to drive said bars upwardly. Each rack bar is also arranged to engage, during the downward movement of the bar, a toothed wheel 52 mounted on the differential shaft 38.

The rack bars 42 are normally held in positions intermediate between the fluted shaft 50 and the toothed wheels 52 respectively by means of levers 54 each acted upon by a spring 56 and having a recess to receive a pin 58 mounted on the corresponding rack bar. I

The rack bars are selectively engaged with the fluted shaft 56 by means of selector levers 60, one for each rack, suspended on arms 62 fixed to rock shaft 64 mounted, at its ends, in bearings on the type carriage frame. These levers normally occupy the depressed inoperative positions shown in Figure 1 and in full lines in Figure 2 and are lifted into operative positions as shown in dotted lines in Figure 2 when the machine is set for computing and the type head or carriage enters the zone of a register. When the corresponding type bar is retracted, the lever 60 occupies the lateral position shown in Figures 1 and 2. Each lever 60 connected with the corresponding type bar m chanism by means of an arm 66 attached to an intermediate lever I4 and a link 68 connecting said arm with the lever 66 so that the lever 68 is swung to the left, Figure 1, as the corresponding type bar is swung toward the platen. If the selector lever 60 is then located in elevated operative position, said lever, as it is swung to the left, will engage the pin 58 on the corresponding rack bar 42 and will swing the rack bar into engagement with the fluted shaft 50.

The engagement of the rack bar with the fluted shaft and with the toothed wheel 52 is also, in part, controlled by a fixed cam plate I attached to a supporting plate I2 mounted on the type carriage frame. This cam plate is engaged by the pin 58. The lateral position of the rack bar is also controlled, in part, by a stop plate I4, mounted on the supporting plate 12 above the cam plate. The rack bar is actuated to disengage the same from the fluted shaft by the engagement of an arm I6 on the rack bar with a pin 18 fixed to a part of the frame of. the type head.

The differential actuator mechanism above described has the following mode of operation, as-

suming that the master wheel 36 is located in the zone of a register and that the levers 60 are lifted into operative positions. When a numeral type bar mechanism is actuated, the corresponding selector lever 60 is swung to the left, Figs. 1 and 2, thereby, through the engagement of the lever with the pin 58, swinging the corresponding rack bar 42 into-engagement with the continuously rotating fluted shaft 50. The rack bar is then driven upwardly by said shaft thereby swinging upwardly the arm 43 and the bail 46 until the arm I6 on the rack bar engages the fixed pin I8. Through the engagement of said arm with the pin, the rack bar is swung to the right, Fig. 1, to disengage the same from the fluted shaft and to engage the pin 58 with the stop plate I4. Through the action of the spring 48 on the bail 46, the arm 43 is swung downwardly, carrying the rack bar downwardly therewith until the pin 58 engages the upper end of the cam plate KI and the rack bar is then swung farther toward the right to engage the same with the toothed wheel 52 on the differential shaft 38. By the continued downward movement of the rack bar, after its engagement with the toothed wheel 52, said wheel, the differential shaft 38 and the master wheel 36 are actuated to enter a digit in the register 30. When the rack bar 42 reaches a predetermined position, it is swung to the left to disengage the same from the toothed wheel 52 by the engagement of the pin 58 with the lever 54 and the bar comes to rest with the pin engaged in a recess in said lever as shown in Fig. 1.

The mechanism for lifting the levers 66 into operative position when the machine is set for computing and the type head or carriage is advanced into the zone of a register is shown particularly in Figs. 2, 3, 4 and 9. Said mechanism comprises a link suspended upon one of the arms 62 fixed to the rock shaft 64. The link 80 is formed with a slot 84 at its lower end in which is engaged a pin 86 mounted upon the forward end of a lever 88 pivoted upon a screw stud 90 mounted in a bracket 92 attached to and extending downwardly from the cover plate 94 of the frame of the type head. The lever 88 carries a pin 96 arranged to engage the upper side or edge of an interponent 98 pivoted at I00 to an arm I02 on a rock shaft I04 mounted to turn in bearings in supporting brackets I06 secured to the under side of the cover plate 94. The interponent 98 rests upon a pin I08 fixed to the forwardly extending arm of a lever III) also pivoted upon the screw stud 96. The rear end of the lever H0 is engaged in a slot in a vertically movable plate I 12 mounted upon the rear wall I I4 of the casing of the type head. The plate H2 is moved downwardly when the type carriage enters the zone of a register thereby swinging the lever III] in a clockwise direction, Figs. 2 and 3, about the screw stud 90. With the machine set for computing as shown in Fig. 2, this movement of the lever IIil, through the interponent 98, swings upwardly the lever 88, the link 80 and the arm 62 to which the link is pivoted, and turns the rock shaft 64 in a direction to lift the selector levers '69 into operative positions,

When the machine is set for writing by the state control mechanism, the rock shaft I94, the arm I62, and the interponent 98 occupy the positions shown in Fig. 3 in which the pin 88 occupies a position at a distance from the upper end of the slot 84 as shown in this figure. With the parts in this position, during the movement of the lever III! in a clockwise direction produced by the advance of the carriage into the zone of a register, the pin 86 moves idly upward in the slot 84 so that the link 80 and the arm 62, to which said link is pivoted, are not lifted. When the machine is set for computing, the rock shaft IM, the arm I82 and the interponent 98 are moved rearwardly to the position shown in Fi 2. The rearward movement of the interponent lifts the lever 88 thereby bringing the pin 86 into the position shown in Fig. 2 at or adjacent to the upper end of the slot 84. With the parts in this position, upon the clockwise movement of the lever H9, produced by the advance of the carriage into the zone of a register, the link 88 and the corresponding arm 62 are lifted to lift the selector levers so into operative positions.

The mechanism. for depressing the rear end of the lever IIB when the type carriage enters the zone of a register comprises a lever H5 (see Figs. 2, 3 and 9) pivoted at H3 on a screw stud fixed in the wall i it of the casing and connected with the vertically movable plate I I2 by means of a pin I mounted on the lever H6 and passing through a slot in said wall. The lever H5 is acted upon by means of a coil spring I2I and the movement of said lever under the influence of the spring is limited by a fixed stop :pin I22 mounted on the casing. The lever H6 is actuated by means of a cam lever 24 also pivoted .on the screw stud i it and having an arm arranged to engage the eccentric I26 adjustably mounted on the lever i I5, the latter lever being connected with the lever M6 by a spring 21. The lever I24 carries a cam plate I28 arranged to be engaged by an actuator plate I36 fixed to the register. When the type head enters the zone register, the cam lever I24 is depressed and if the machine is set for computing, the lever 88 is lifted from the lever IIIl through the interponent 98 to elevate the link 88 to lift the levers into operative positions.

The position of the interponent 98 is controlled by a manually adjustable setting lever. To this end, an arm I32 (see Figure 4) is fixed to the rock shaft I84 and engages in a slot I36 in a lever I38 pivoted at Mil on one of the side plates of the carriage casing. This lever is acted upon by a coil spring M2 which tends constantly to.

swing the lever to the right, Figure 4. A second lever M4 is also pivoted at M9 on the casing and is connected with the lever E38 by means of a pin I secured to the lever 33 and engaging in a slot I -lfi formed in the lever M l. is pivotally connected at its upper end with the rear end of a longitudinally movable link I lfi which is supported by said lever and by a stud 56 secured in the side plate of the carriage casing and engaging in a longitudinal slot 852 in thelink. The link i l-3 is adjusted longitudinally by means of manually operable setting lever I55 pivoted at I56 on an upright plate Iiil at one end of the carriage. The setting lever is provided, at its lower end with a slot the in which engages a pin I58 fixed in the link M58. The lever I56 is provided with a forwardly extending arm I60 by which the lever may be manually adjusted. The lever is arranged to be adjusted in three different positions to control the condition of the machine and a detent lever E62 is pivoted at I64 on the plate I57 and is acted upon by a coil spring I66 which tends to swing the lever to engage a tooth or projection at the forward end thereof with any one of the three notches 468 in the lever I54 to The lever I44 2 hold the latter lever in any one of the three Dositions in which it may be adjusted.

The lever I54 controls the angular positions of the arm I32, the rock shaft I04 and the arm I02 and the longitudinal position of the interponent 98. Figure ishows the lever I54 adjusted in compute position. With the lever in this position the parts are adjusted to locate the interponent in its rearward position as shown in Fig. 2 to enable or render operative the differential mechanism when the carriage enters the zone of a register. Tocondition the machine for typing totals, the lever I5l is adjusted to locate the central recess I63 in position to be engaged by the tooth on the detent lever I62, and the rock shaft 354 is thus adjusted to locate the interponent 98 substantially in the position shown in Figure 3 to render inoperative the differential mechanism upon the entry of the carriage into the zone of a register. To condition the machine for writing only, the lever M54 is adjusted to locate the lowermost recess in position to be engaged by the tooth on the detent lever I62. The rock shaft Hi l and the interponent 238 then occupy substantially the position shown in Figs. 3 and 4 and the differential mechanisms are not enabled when the carriage enters a register zone.

The es-capement mechanism for controllin the step by step advance of the carriage during a typing operation (see Figs. 1 and 9) comprises a toothed escapement wheel IlIl mounted on a shaft I12 journaled in hearings in spaced brackets I'M fixed to the underside of the deck I76 of the carriage. To this shaft is also attached a pinion are meshing with the teeth of a rack I80 secured to the line space frame. Said escapement mechanism also comprises a holding pawl I82 p-ivotedon one of the brackets lit and arranged to engage the teeth of the escapement wheel I10, a spacing pawl Hi l also pivoted on one of said brackets and arranged to engage the teeth of the wheel a link 58% connecting the holding pawl with the spacing pawl, a spring lSfi also connecting said pawls and a link or bar 5% connecting the spacing pawl with an arm I92 (see Fig. 1) fixed to a rock shaft 19$ mounted to turn in hearings on the frame of the type head. To said rock shaft 5% are also attached two forwardly extending spaced arms I96 upon which is suspended the universal bar I93. The universal bar is arranged to be engaged by the lower ends of the contact or abutment screws 200, one of which is mounted in each of the intermediate levers I4.

All of the mechanisms above described of the present machine have substantially the same construction arrangement and mode of operation as the corresponding mechanisms illustrated and described in applicants Patent No. 2,370,505.

The present machine is provided with mechanism for locking the type carriage against movement in a return direction under certain conditions, when the state control mechanism is adjusted to set the machine for computing and the carriage is located in the zone of a register. This locking mechanism (see Fig. 5) comprises a pinion 202 mounted on a short shaft 2% journaled in bearings in the spaced brackets I'M. This pinion meshes with the escapement rack 18B so that the gear rotates during either the advance or the return movement of the carriage. In order to lock this ear against rotation and thereby lock the type carriage from return movement, a pawl 2 is pivoted at 208 on' one of the brackets I14 and is arranged to engage the teeth of the gear.

The mechanism for actuating the pawl comprises a lever 2 l 0 also pivoted at 208 on said bracket and carrying a pin -2l2 against which an arm on the pawl is normally held by a tension spring 214 to hold yieldingly the pawl in position with relation to the lever 2l0. The lever 2l0 is acted upon by a coil spring 2 I6 which tends to swing the lever in a clockwise direction, Fig. 5. The lever 210 is connected by means of a link 2 I8 with .a bell crank lever 220 pivoted at 222 on a bracket 223 attached to the deck I16 of the carriage and this lever is connected by a link 224 with .a second bell crank lever 226 secured to a rock shaft 228 mounted to turn in bearings formed in the bracket 223 and on a second bracket 230 secured to .the deck of the carriage. Upon the rear end of the shaft 228 is fixed an arm 234 and the movement of the lever 210, the rock shaft 228 and the parts connecting said lever with the rock shaft under the action of the spring 2 I6 is limited by a pin 236 mounted on the bracket 230 and arranged to be engaged by the arm 234. The angular position of'the rock shaft 228 and thereby the position of the locking pawl 206 are controlled from the differential actuator bail 46 and from the rockshaft 64.

When the state control mechanism is adjusted for typing without computing, the rock shaft 228 and the parts attached thereto are located in the positions shown in Fig. 5 in which the locking pawl 206 is out of locking engagement with the pinion 202 both when the .carriage is located out of the zone of a register and when said carriage is located in the zone of a register.

With the state control mechanism adjusted to set the machine for computing, the rock shaft 228 and the attached parts are located in positions shown in Fig. 5, when the carriage is positioned out of the zone of a register and when the carriage is positioned in the zone-of a register and no digit has been entered in any of the denominations of the register. With the state control mechanism set for computing and the carriage located in the zone of a register, upon the entry of a digit in the register by the differential mechanism, the rock shaft 228 and attached parts are turned in. a counterclockwise direction from the positions shown in Fig. 5 to cause the engagement of the lockin pawl 206 with the pinion 202 to lock the carriage against movement in a return direction and the rock shaft is held in this position while the carriage remains in the zone of a register.

With the state control mechanism adjusted to set the machine for typing without computing,

when the carriage enters the zone of a register, a l

the rock shaft 64 is not affected but remains in the position shown in Fig. 2. With the state control mechanism adjusted to set the machine for computing, when the carriage enters the zone of a register, the rock shaft 64 is turned in a clock wise direction from the position shown in Fig. 2 to the position shown in Fig. 6. When .a digit is thereafter entered in one :of the denominations of the register, the differential actuator bail acts to swin the rock shaft 228 .in a counterclockwise direction, Fig. 5, to engage the =locking pawl 206 with the pinion 202 and the rock shaft is held in this angular position while the carriage remains in the zone of a register by means-of a latch which is controlled from the rock shaft 64. The mechanism for actuating the rock shaft 228 from the d fferential actuator bail 46 comprises a rod or at its lower end with the horizontally extending arm of the bell crank 226 and the upper end of the rod is connected by a coil spring 240 with the bail 46. With this construction, upon the upper movement of the differential actuator bail 46 produced by the upward movement of a differential actuator rack bar, the rod 238 is moved upward by the bail and the bell crank 226 and rock shaft 228 are swung in a counterclockwise direction, Fig. .5, to engage the locking pawl 206 with the pinion 202 thereby to lock the type head or carriage from return movement. In order to hold the locking pawl in looking position when the di-fierential actuator bail 46 descends, a catch plate or latch 242 is fixed to the underside of the rock shaft 64 by means of a suitable screw 244. This catch plate has the reversed S shape shown in Fig. 5, looking from the rear of the machine, and the upper bar of the S is attached to the rock shaft 64 as shown in this figure.

The rod 238 normally is located in the depressed position shown in Figs. 2 and 5 and the catch plate 242 also is normally located in the position shown in these figures so that the lower bar of the S is positioned in opposed relation and adjacent to the lower end of the hook 246 formed on the upper end of the rod 238. When the rock shaft 64 is turned in a clockwise direction, Figs. 2 and 6, upon the entry of the carriage into the zone of a register, the catch plate 242 is swung forward by the turning of the rock shaft 64 and the lower bar of the S engages the lower end of the hook 246 as shown in Fig. 6, the catch plate bending slightly under this contact. The rod 238 and the locking pawl however remain in unlocking positions while the carriage remains in the zone of a register as long as no digit is entered in the register. Upon the entry of a digit into the register, the upward movement of the actuator bail 46 lifts the rod 238 and turns the rock shaft 228 in a counterclockwise direction to engage the pawl 206 with the pinion 20 2. This upward movement of the rod 238 carries the lower end of the hook 246 upward beyond the lower bar of the S of the catch plate 242 and the catch plate then springs forwardly beneath the hook to hold the rod in elevated position when the bail 46 descends. Thus the carriage is locked against return movement as long as the carriage remains in the zone of a register. When the carriage leaves the zone of a register, the rock shaft 64 swings back in a counterclockwise direction and the catch plate 242 is swung rearwardly to disengage the same from the lower end of the hook 246 on the rod 238. The parts are then actuated by the spring .216 to .depress the rod 238 to its normal position and to disengage the pawl 206 from looking engagement with the pinion 202.

The return movement of the carriage causes the rotation of the pinion 202 in clockwise direction and the advance movement of the carriage causes the pinion to rotate in a counterclockwise direction. The pawl 206 is so constructed and arranged that, when engaged with the pinion .202, it will lock the pinion against movement in a clockwise direction to lock the carriage against return movement but will allow the pinion to rotate in a counterclockwise direction, the pawl then swinging slightly away from the axes of the pinion against the action of the spring 2l4 to allow the teeth of the gear to turn past the acting end of the pawl. Thus the pawl will furnish only very slight resistance to the advance movement of the carriage.

The machine illustrated in the present application is provided with an electric driving motor 239 mounted on a suitable bracket secured to the line space frame. The motor is arranged to be driven continuously during the use of the machine and is provided with theusual electrical connections 24! forming a circuit controlled by an ordinary manually operated switch 243.

The shaft 245 of the driving motor carries a pulley 241 which is connected by a belt 248 with a pulley 258 journaled upon a fixed shaft 252 having its ends supported on the line space frame. Attached to the pulley 250 is a spiral gear 252 meshing with the spiral gear 255 secured to the shaft 258 rotatively mounted in bearings carried by the line space frame. The shaft 258, which is longitudinally fixed in its bearings, is arranged to drive the longitudinally movable shaft 260 which is also mounted in suitable bearings on the line space frame and the driving connection between the shaft 258 and the shaft 266 is arranged to accommodate the longitudinal movement of the shaft 268, as shown and described in said Patent No. 2,370,505.

The driving connections between the shaft 260 and the type carriage comprises a bevel gear 210 fixed to a sleeve 2T2 engaging in a bearing formed on the line space frame. The driving connection between the shaft 260 and the sleeve 212 comprises a key secured to the shaft and engaging in a key way in a central bushing to which the sleeve 212 is attached, this construction being provided to allow a longitudinal movement of the shaft while the gear 210 remains axially stationary.

The bevel gear 210 meshes with a bevel gear 214 fixed to the forward end of the countershaft 21B mounted in suitable bearings on the line space frame. To the rear end of the shaft 216 is fixed a gear 218 meshing with a gear 280 secured to the rear end of the carriage return countershaft 282 also mounted in suitable bearings on the line space frame and having the driving member 284 of the carriage return clutch attached to the forward end thereof. The driven member 286 of said clutch is fixed to the rear end of a sleeve 288, upon the forward end of which sleeve is mounted the relatively wide carriage return pinion 29E! meshing with the teeth of the carriage return rack 294 secured to the carriage Ill.

The carriage return drive mechanism is thrown into operation by moving the sleeve 288 longitudinally rearward on the shaft 282 to engage the driven member 286 of the carriage return clutch with the driving member 284 thereof and the carriage return drive mechanism is thrown out of operation when the carriage reaches a predetermined point in its return movement by moving the sleeve 288 longitudinally forward on the shaft 282 to disengage the driven member of the clutch from the driving member thereof. The sleeve 288 is moved longitudinally of the shaft 282 to engage and disengage the carriage return clutch by means comprising a'carriage return bail and connections between the same and the sleeve.

The mechanism for controlling the movement of the clutch sleeve 2% on the shaft 282 to enthe driven member of the carriage return clutch with the driving member and to disengage the driven member from the driving member comprises a clutch shifting arm 2% fixed to a rock shaft 29% mounted in bearings on the line space frame, said arm having its free end engaged in a groove 30!! in the sleeve, An intermediate clutch arm 302 is secured to the other end of the shaft 298 and is provided with a lateral locking lip 304i engaged by a hooked latch 306 pivoted on a trip rock shaft 368 extending across the machineand supported in bearings on the line space frame. A fan-shaped trip arm 309 fast on the trip shaft 308 extends rearwardly between two studs 3".) and 3E2 projecting respectively from the hooked latch 38% and from the clutch controlling arm 3H2, a normally tensioned spring 3M connecting the two studs to form a yielding link there between and normally maintaining the hooked latch 306 engaged with the clutch controlling arm 392 to retain the members of the carriage return clutch disengaged.

The carriage return tripping bail 3l6 is mounted at the outer ends of the standards 3!! secured to .the trip rock shaft 388. This tripping bail normally occupies a rearward position as shown in Fig. 10 to maintain the members of the carriage return clutch disengaged. The bail is automatically swung forwardly, as the carriage reaches the end of a line of typing, to engage the carriage return clutch and cause the carriage to be returned to full return position. The machine is also provided with mechanism for swinging the bail forwardly to engage the carriage return clutch upon depression of any one of a plurality of carriage return keys. Automatic mechanism is also provided which, when the carriage reaches the desired returned position, swings the bail rearwardly to disengage the carriage return clutch.

The key operated mechanism for actuating the bail to engage the carriage return clutch comprises a rock shaft SIB mounted to turn in bearings carried by the frame of the type carriage, to which shaft is fixed an arm 32E] arranged to engage the rear face of the bail 316 as shown in Fig. 10. To the other end of the rock shaft 3H8 is secured a second arm 322 which carries a stud 324 engaging in a slot in a downwardly extending arm of a lever 326 pivoted at 328 on the side plate of the type carriage. Another arm of the lever is provided with a lip 33D arranged normally to engage a rigid pin 332 projecting laterally from the side plate of the type'carriage as shown in Fig. 10, the parts being shown in this figure in the position which they assume when the bail 31B is in its rearward position with the members of the carriage return clutch disengaged. The rock shaft 3H3 is acted upon by a coil spring 334 which normally holds the shaft in position with the bail actuating arm 320 in its rearward position as shown in Fig. 10. The lever 32B is swung rearwardly to actuate the rock shaft 3H3 andthe bail actuating arm 326 to cause the engagement of the carriage return clutch by means comprising a key lever 336 pivoted at 328 on the side plate of the type carriage and provided with a, by-

pass pawl 338 pivoted on the key lever and arranged to engage the lip 339 on the lever 326.

This pawl is acted upon by a coil spring 340 which tends to swing the same to the left, Fig. 10, and maintains the pawl in engagement with the stud 332, the pawl having a cam face, on its left hand side, which engages said stud.

The machine is provided with mechanism for arresting the return of the carriage selectively with the carriage in fully returned position or with the carriage in either of two partial return positions. The mechanism for arresting the return movement of the carriage has no particular hearing on the present invention and this 13 mechanism therefore is not shown or described in this application.

The entire carriage return and sto ping mechanisms, including the mechanism for ing the carri ge roturn bail automatically to engage the c-" ge return clutch, mechanism operated by either of two carriage return keys for shifting the bail to engage the carriage return clutch, mechan l for shifting automatically the carriage retur. hall to disengage the carriage return clutch, and devices for stopping the carriage in full return position or in either of two partial return positions under control of said have substantially the constru ztion arrangement ion 'as the corresponding illustrated and described in applicants 'ent No. 2,379,535.

With tllestate co "ol'mechanismset for computing when the car as is located in the zone of a register and no oigit nas been entered in the register, the carriage return mechz-inisni free to be rendered op 'a" by the key lever 33 to engage the earrin rn clutch. When a digit entered in the l gister under these conditions, a locking mechanism rendered operative which prevents the carriage return mechanism from being thrown into operation by the depression of the key lever.

This locking mechanism comprises the arm 234 fixed to the rock shaft 228 and a collar 342 secured to the manually operable carriage return rock shaft 3l8 adjacent the'arm. This collar is formed with a projection or shoulder 34% arranged to be engaged by the lower end of the arm 234 to pre vent the rock shaft 318 from being turned by the actuation of the key lever 338 to actuate the carriage return bail to engage the carriage return clutch. When the carriage is located out of-the zone of a register and when the machine is set for typing without computing and the carriage is located in the zone of a register, the arm 234 is located out of locking position with relation to the shoulder 34 5 on collar 342 as shown in Fig. 5. The arm 234 is also located out of locking position when the machine is set for computing, the carriage is located in the zone of a register and no digit has been entered in the register. Under these conditions, uponth'e entry of a digit into the register, the rock shaftMB is turned in a counterclockwise direction, Fig. 5, to locate the arm 234 in looking position above the shoulder 344 on collar 342, to prevent the turning of the rock shaft 3-18 to actuate the carriage return bail to engage the carriage return clutch, The arm remains in the locking position While the carriage is located in the zone of a register and is swung back to unlocking position with the turning of the rock shaft 228 as the carriage moves out of the zone of a re ister. Thus the mechanism for shifting the carriage return bail by the actuating of the key lever 33% .to engage the carriage return clutch is locked against operation under the same conditions that the carriage is locked against return movement.

It is to be understood that the terms active, operative and in operation, employed in the claims and applied to the locking, preventing or holding means for preventing certain movement of one or more of the parts or relative movement of certain of the parts or a certain action, indicate that said meansis in condition to prevent said movement, relative movement or action and that the term inactive, as applied to the locking, preventing or .holding means, indicatcsthat said means is in condition to permit said movement, relative movement or action.

Having explained the nature and object of the invention and having specifically described a machine embodying the invention in its preferred form, what is claimed is:

l. A machine of the class described comprising a register and actuating mechanism for the reg ister, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of a register and from denomination to denomination of the register and to return relatively the actuating mechanism and the register, locking means normally in unlocking condition for preventing relative return movement from'being imparted to the register and the actu ating mechanism when the actuating mechanism is in the zone of a register and means controlled by the relative positions of the register and the actuating mechanism and iii-accordance with the digit entering action oi the actuating mechanism for shifting said locking means into locking condition -when. the actuating mechanism is in the zone of a register after a digit has been entered in the register for maintaining said locking means in looking condition until the differential mechanism leaves the register zone.

2. A machine of the class described comprising a register and actuating mechanism for the register, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of the register and from denomination to denomination of the register and to return relatively the actuating mechanism and the register, locking means, in unlocking condition when the actuating mechanism enters the zone of the register, for preventing relative return movemerit from being imparted to the register and the actuating mechanism and. means controlled by the actuating mechanism when the actuating mechanism in the zone of a register for placing the locking means in locking condition from the time immediately following the entry of a digit in the register until the actuating mechanism leaves the register zone.

3. A machi ie of the class described comprising register and actuating mechanism for the register, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of a register and from denomination to denomination of the register and to return relatively the actuating mechanism and the regi. ter, locking means, in unlocking condition when the actuating mechanism is out of the zone of a register and when the actuating mechanism has entered the zone of the register and no digit has been entered in the register, for preventing relative return movement from being imparted to he register and the actuating mechanism and means controlled in accordance with the operation of said actuating mechanism when said mechanism is in a register zone for placing said said locking means in looking condition upon the entry of a digit in the register and for maintaining said locking means in locking condition until the actuating mechanism leaves the register zone.

4. A machine of the class described comprising a register and differential actuating mechanism for the register, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of a register and from denomination todenomination of the register and to return relatively the actuating mechanism and the register, said actuating means including a series of differential actuators, normally inactive locking means for preventing relative return movement from being imparted to the register and the actuating mechanism, mechanism operated by each diiferential actuator during the number entering action thereof for moving certain parts of the locking means into locking positions and means for causing the said parts of the locking means to be retained in looking positions thereafter while the actuating mechanism is in the zone of a register.

5. A machine of the class described comprising a register and diiferential actuating mechanism for the register, relatively movable to shift the differential mechanism in an advance direction into and out of the zone of a register and from denomination to denomination of the register and to return relatively the differential mechanism and the register, normally inactive locking means for preventing relative return movement from being imparted to the register and the differential mechanism while the diiferential mechanism is in the zone of a register and a digit has been entered in the register, means operated by the differential mechanism for moving certain parts of the locking means into locking positions and means for retaining said parts in locking positions while the actuating mechanism is in the zone of a register.

6. A machine of the class described comprising a register and differential actuating mechanism for the register, relatively movable to shift the differential mechanism in an advance direction into and out of the zone of a register and from denomination to denomination of the register and to return relatively the differential mechanism and the register, normally inactive locking means for preventing relative return movement from being imparted to the register and the differential mechanism, means operated by the differential mechanism for moving the locking means into locking position and means rendered operative upon the entry of the difierential mechanism into the zone of a register for retaining the locking means in looking position while the differential mechanism remains thereafter in the register zone.

'7. A machine of the class described comprising a register and differential actuating mechanism for the register, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of the register and from denomination to denomination of the register and to return relatively the actuating mechanism and the register, locking means for preventing the register and the actuating mechanism from being moved relatively in a return direction, means operated by the diiferential mechanism for moving the locking means into locking position, a lock retaining device located normally in inoperative position, means for moving the retaining device into operative position as the difierential mechanism is moved into the zone of a register and for moving said device out of operative position as the differential mechanism is moved out of the zone of a register.

8. A machine of the class described comprising a register mechanism, difierential actuating iechanism for the register, a carriage for supporting one of said mechanisms mounted for movement in one direction to shift the actuating mechanism in an advance direction into and out of the zone of the register and from denomination to denomination of the register and in the opposite dire-ction to return the actuating mechanism with relation to the register, normally inactive means for locking the carriage against the latter movement and means controlled by the carriage and by the differential mechanism for rendering the lockin means operative when the carriage is in position with the actuating mechanism in the zone of the register upon the entry of a digit in the register and means for retaining said locking means thereafter in locking condition while the actuating mechanism remains in the register zone.

9. A machine of the class described comprising a register mechanism, actuating mechanism for the register, a carriage for supporting one of said mechanisms, mounted for movement in one direction to shift the actuatin mechanism in an advance direction with relation to the register into and out of the zone of the register and from denomination to denomination of the register and in the opposite direction to return the actuating mechanism with relation to the register, power operated mechanism for returning the carriage, manually operable means for throwing into operation the carriage return mechanism, looking means for preventing the carriage return mechanism from being thrown into operation by said manually operable means and means for rendering said locking means operative only when the carriage is in the zone of a register and a digit has been entered in the register.

10. A machine of the class described comprising register mechanism, actuating mechanism for the register, a carriage for supporting one of said mechanisms mounted for movement in one direction to shift the actuating mechanism in an advance direction with relation to the register into and out of the zone of the register and from denomination to denomination of the register and in the opposite direction to return the actuating mechanism with relation to the register, power operated mechanism for returning the carriage, manually operable means for throwing into operation the carriage return mechanism, looking means inactive when the actuating mechanism enters the zone of the register for preventing the carriage return mechanism from being thrown into operation by said manually operable means and means for rendering the locking means operative while the actuating mechanism is in the zone of the register upon the entry of the digit in the register.

11. A machine of the class described comprising a register and actuating means for entering numbers, digit by digit, in the register, relatively movable to carry the actuating means into and out of the zone of the register and from denomination to denomination of the register, an element constructed and arranged to be shifted from one predetermined position to another predetermined position, means for preventing the shifting of said element into the latter position and machine controlled mechanism for rendering said preventing means active initially upon the entry of a numberin the register and for continuing the same in active condition thereafter while the actuating means is in the register zone.

12. A machine of the class described comprising a register and actuating means for entering numbers, digit by digit, in the register, relatively movable to carry the actuating means into and out of the zone of the register and from denomination to denomination of the register, a shiftable device mounted for a predetermined movement from one predetermined position to another predetermined position to condition certain parts of the machine to perform a certain operation,

means for preventing the shifting of said device intothelatter position inactive when the actuating means first enters the zoneof the register and automatically controlled means for there after rendering the preventing means active when a number is entered in the register in said cycle and'until the actuating means leaves the zone of the register.

13. A machine of the class described comprising a register and actuating means for entering numbers, digit by digit, in the register, relatively movable to carry the actuating means into and out of the zone of the register and from denomination to denomination of the register, a device movable from one position in which the parts of the machine are conditioned to perform a certain operation to another position to condition certain parts of the machine to perform another operation, means controlled by the actuating means for preventing the shifting of said device and mechanism for putting the preventing means in operation initially when a number is entered in the register by the actuating means and for retaining said preventing means in operation thereafter while the actuating means remains in the register zone.

14. A machine of the class described comprising a register and actuating means for entering numbers, digit by digit, in the register, relatively movable to carry the actuating means into and out of the zone of the register and from denomination to denomination of the register, an element shiftable from one position in which cer tain parts of the machine are conditioned to perform a certain operation to another position in which said parts are conditioned to perform another operation, means for holding said element against being shifted to the latter position rendered operative by the actuating means as a number is entered in the register by said means and mechanism for retaining the holdin means thereafter in operation until the actuating means leaves the zone of the register.

15. A machine of the class described comprising a register mechanism, actuating mechanism for entering numbers, digit by digit, in the register, means for supporting one of said mechanisms for shifting movement with relation to the other mechanism to carry the actuating mechanism into and out of the zone of the register and from denomination to denomination of the register and to return the actuating mechanism with relation to the register, power operated means for returning the shiftable mechanism, control mechanism for throwing into operation the said returning means, means for preventing the re turning means from being thrown into operation by said control mechanism and machine controlled mechanism for rendering said preventing means initially operative upon the entry of a digit in the register and for continuing the same in active condition while the actuating mechanism is in the zone of the register.

16. A machine of the class described comprisin a register mechanism, actuating mechanism for entering numbers, digit by digit, in the register, means for supporting one of said mechanisms for shifting movement with relation to the other mechanism to carry the actuating mechanism into and out of the zone of the register and from denomination to denomination of the register and to return the actuating mechanism with relation to the register, power operated means for returning the shiftable mechanism, control mechanism for throwing into operation the said returning-means, means inactive whenthe actuating mechanism first enters the'zoneof the register for preventing the returning means frombeing thrown intooperationzandmeans automatically controlled by the machine for thereafter rendering the preventing means active whena digit is entered in the register'and for retaining said preventing meansin active condition until the'actuatedmechanism leaves the zone of the register.

17. A machine of the class described comprising a register mechanism, actuating mechanism for entering numbers, digit by digit, in the register, means for supporting one of said mechanisms for movement with relation to the other mechanism to carry the actuatin mechanism into and out of the zone of the register and from denomination to denomination of the register and to return the actuating mechanism with relation to the register, power operated means for returning the shiftable mechanism, control mechanism for throwing into operation said returning means, means controlled by the actuating mechanism for preventing said control mechanism from being operated to throw said returning means into operation and mechanism for putting the preventing means in operation initially when a number is entered in the register and for retaining said preventing means in operation thereafter while the actuatin mechanism remains in the zone of the register.

18. A machine of the class described comprising a register and actuating mechanism for entering numbers, digit by digit, in the register, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of the register and from denomination to denomination of the register and to return relatively the actuating mechanism and the register, normally inactive means for preventing relative return movement from being imparted to the register and the actuatin mechanism and machine controlled mechanism for rendering said preventing means active upon the entry of a number in the register and for continuing the same in active condition thereafter until the actuating mechanism leaves the zone of the register.

19. A machine of the class described comprising a register and actuating mechanism for entering numbers, digit by digit, in the register, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of the register and from denomination to denomination of the register and to return relatively the actuting mechanism and the register, shift preventing means for preventing relative return movement from being imparted to the register and the actuating mechanism, inactive when the actuating mechanism first enters the zone of the register and automatically controlled means for thereafter rendering the preventing means active when a number is entered in the register and thereafter while the actuating mechanism remains in the register zone.

20. A machine of the class described comprising a register and actuatin mechanism for entering numbers, digit by digit, in the register, relatively movable to shift the actuating mechanism in an advance direction into and out of the zone of the register and from denomination to denomination of the register and to return relatively the actuating mechanism and the register, means controlled by the actuating mechanism 20 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 893,719 Wahl July 21, 1908 893,724 Goldberg July 21, 1908 2,370,505 Sundstrand Feb. 27, 1945 

